function checkForm() {
	$('.lunpan_box').css('display','block');
	var username = document.login.username.value;
	var yuanwang = document.login.yuanwang.value;
	if (username == "") {
		alert("您没有填昵称！");
		document.login.username.focus();
		return false;
	};
	if (yuanwang == "") {
		alert("您忘记留愿望了哦！");
		document.login.yuanwang.focus();
		return false;
	}
	
}